Minions
#27 in Coding AgentsStripe · 3× · last seen Aug 26, 2026
16
Momentum
Minions is an internal AI coding agent system from Stripe that is not sold publicly. It is based on a fork of the Open Source agent framework "Goose" from Block and independently creates complete Pull Requests from task descriptions (e.g., from Slack, tickets, or Google Docs), including code, tests, and documentation. The agents work unattended (without intermediate human steps) in isolated cloud development environments (Devbox) and use an internal MCP tool system ("Toolshed") to access Stripe's codebase, CI/CD, and documentation; only the final PR is reviewed by humans. According to Stripe, this now results in over 1,300 Pull Requests per week created entirely without human-written code.
Momentum trend
01.06.30.08.
Features
| Base Model | No single officially named base model; agent harness is a Goose fork used e.g. with Claude |
| License | Proprietary/internal; built on a fork of Block's open-source Goose framework (Apache-2.0) |
| Platform | Runs in isolated cloud dev sandboxes (AWS EC2) within Stripe's internal dev infrastructure |
| Price | Not a product – internal Stripe tool only, not for sale |
| Release Date | Forked from Goose in late 2024; publicly detailed in Stripe Dev blog posts in 2026 |
| Interface (IDE/CLI/Web) | Triggered primarily via Slack message/emoji reaction; output is a GitHub pull request |
| Supported Languages | Primarily Ruby (with Sorbet typing) across Stripe's codebase of hundreds of millions of lines of code |